diff options
| author | Dave Jones <davej@redhat.com> | 2008-03-05 14:07:34 -0500 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2008-04-28 15:05:42 -0400 |
| commit | 457091181176643787a547dc04eb3cf5dcd822ce (patch) | |
| tree | 4e9e5434960137470cd39348cef4dbc73d7675d8 | |
| parent | 905d77cd95e856b8e0b2d099fb70b9b8ccb7337e (diff) | |
[CPUFREQ] Refactor locking in cpufreq_add_dev
Simplify this by moving the unlocking out of the error
paths into the exit path.
Signed-off-by: Dave Jones <davej@codemonkey.org.uk>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 34 |
1 files changed, 11 insertions, 23 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 0f10ce21d87..be78c07f72c 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -799,7 +799,6 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) ret = cpufreq_driver->init(policy); if (ret) { dprintk("initialization failed\n"); - unlock_policy_rwsem_write(cpu); goto err_out; } policy->user_policy.min = policy->cpuinfo.min_freq; @@ -822,7 +821,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) /* check for existing affected CPUs. They may not be aware * of it due to CPU Hotplug. */ - managed_policy = cpufreq_cpu_get(j); + managed_policy = cpufreq_cpu_get(j); // FIXME: Where is this released? What about error paths? if (unlikely(managed_policy)) { /* Set proper policy_cpu */ @@ -841,14 +840,11 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) ret = sysfs_create_link(&sys_dev->kobj, &managed_policy->kobj, "cpufreq"); - if (ret) { - unlock_policy_rwsem_write(cpu); + if (ret) goto err_out_driver_exit; - } cpufreq_debug_enable_ratelimit(); ret = 0; - unlock_policy_rwsem_write(cpu); goto err_out_driver_exit; /* call driver->exit() */ } } @@ -858,33 +854,26 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) /* prepare interface data */ ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, &sys_dev->kobj, "cpufreq"); - if (ret) { - unlock_policy_rwsem_write(cpu); + if (ret) goto err_out_driver_exit; - } + /* set up files for this cpu device */ drv_attr = cpufreq_driver->attr; while ((drv_attr) && (*drv_attr)) { ret = sysfs_create_file(&policy->kobj, &((*drv_attr)->attr)); - if (ret) { - unlock_policy_rwsem_write(cpu); + if (ret) goto err_out_driver_exit; - } drv_attr++; } - if (cpufreq_driver->get){ + if (cpufreq_driver->get) { ret = sysfs_create_file(&policy->kobj, &cpuinfo_cur_freq.attr); - if (ret) { - unlock_policy_rwsem_write(cpu); + if (ret) goto err_out_driver_exit; - } } - if (cpufreq_driver->target){ + if (cpufreq_driver->target) { ret = sysfs_create_file(&policy->kobj, &scaling_cur_freq.attr); - if (ret) { - unlock_policy_rwsem_write(cpu); + if (ret) goto err_out_driver_exit; - } } spin_lock_irqsave(&cpufreq_driver_lock, flags); @@ -906,10 +895,8 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) cpu_sys_dev = get_cpu_sysdev(j); ret = sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj, "cpufreq"); - if (ret) { - unlock_policy_rwsem_write(cpu); + if (ret) goto err_out_unregister; - } } policy->governor = NULL; /* to assure that the starting sequence is @@ -949,6 +936,7 @@ err_out_driver_exit: cpufreq_driver->exit(policy); err_out: + unlock_policy_rwsem_write(cpu); kfree(policy); nomem_out: |